Allocated but unannounced space

Every block here was allocated or assigned by a regional internet registry, and none of them appeared in any routing table we collected at our last snapshot — neither as a route of their own, nor covered by a larger announcement, nor carved up into more specifics.

“Unannounced” does not mean “unused”

Plenty of allocated space is deliberately kept off the public internet: private interconnects, lab and lawful-intercept ranges, networks reachable only inside one operator, and space held in reserve. Some of it is announced somewhere our collectors cannot see, which is a limit of our vantage points rather than a fact about the block.

It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today. Nothing on this page means a block is unallocated, available, or free to announce.

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Countries with unannounced space registered through ARIN, largest first.

Unannounced blocks registered through ARIN

30,434 blocks match, ordered by prefix.

Allocated but unannounced blocks, 26951 to 27000 of 30434
Prefix	Addresses	Registry	Country	Allocated
2607:a900::/32	4.3B × /64	ARIN	US	15th Jun 2012
2607:a980::/32	4.3B × /64	ARIN	US	27th Sept 2016
2607:aa00::/32	4.3B × /64	ARIN	US	8th Mar 2011
2607:aa40::/32	4.3B × /64	ARIN	US	17th Apr 2024
2607:ab40::/32	4.3B × /64	ARIN	US	17th Apr 2024
2607:ac40::/32	4.3B × /64	ARIN	US	19th Apr 2024
2607:ae00::/32	4.3B × /64	ARIN	CA	9th Mar 2011
2607:ae40::/32	4.3B × /64	ARIN	US	23rd Apr 2024
2607:af00::/32	4.3B × /64	ARIN	US	15th Jun 2012
2607:af80::/32	4.3B × /64	ARIN	US	7th Oct 2016
2607:b000::/32	4.3B × /64	ARIN	US	13th Apr 2010
2607:b080::/32	4.3B × /64	ARIN	US	7th Oct 2016
2607:b0c0::/32	4.3B × /64	ARIN	US	30th Apr 2024
2607:b1c0::/32	4.3B × /64	ARIN	US	2nd May 2024
2607:b200::/32	4.3B × /64	ARIN	US	9th Mar 2011
2607:b240::/32	4.3B × /64	ARIN	CA	2nd May 2024
2607:b280::/32	4.3B × /64	ARIN	US	12th Oct 2016
2607:b340::/32	4.3B × /64	ARIN	PR	7th May 2024
2607:b540::/32	4.3B × /64	ARIN	US	14th May 2024
2607:b5c0::/32	4.3B × /64	ARIN	CA	15th May 2024
2607:b700::/32	4.3B × /64	ARIN	US	22nd Jun 2012
2607:b880::/32	4.3B × /64	ARIN	US	20th Oct 2016
2607:b8c0::/32	4.3B × /64	ARIN	US	4th Jun 2024
2607:b980::/32	4.3B × /64	ARIN	CA	21st Oct 2016
2607:ba00::/32	4.3B × /64	ARIN	US	9th Mar 2011
2607:ba40::/32	4.3B × /64	ARIN	US	6th Jun 2024
2607:bb00::/32	4.3B × /64	ARIN	US	25th Jun 2012
2607:bc0::/32	4.3B × /64	ARIN	US	22nd Nov 2022
2607:bc80::/32	4.3B × /64	ARIN	US	26th Jun 2026
2607:bce0::/32	4.3B × /64	ARIN	US	23rd Jul 2026
2607:be00::/32	4.3B × /64	ARIN	CA	10th Mar 2011
2607:be80::/32	4.3B × /64	ARIN	US	28th Oct 2016
2607:bec0::/32	4.3B × /64	ARIN	US	26th Jun 2024
2607:bf00::/32	4.3B × /64	ARIN	US	25th Jun 2012
2607:bfc0::/32	4.3B × /64	ARIN	US	27th Jun 2024
2607:c080::/32	4.3B × /64	ARIN	US	31st Oct 2016
2607:c0::/32	4.3B × /64	ARIN	US	19th Oct 2022
2607:c0c0::/32	4.3B × /64	ARIN	CA	28th Jun 2024
2607:c100::/32	4.3B × /64	ARIN	US	25th Jun 2012
2607:c140::/32	4.3B × /64	ARIN	US	1st Jul 2024
2607:c180::/32	4.3B × /64	ARIN	CA	31st Oct 2016
2607:c240::/32	4.3B × /64	ARIN	US	8th Jul 2024
2607:c340::/32	4.3B × /64	ARIN	US	9th Jul 2024
2607:c380::/32	4.3B × /64	ARIN	US	7th Nov 2016
2607:c3c0::/36	268M × /64	ARIN	US	9th Jul 2024
2607:c440::/32	4.3B × /64	ARIN	US	11th Jul 2024
2607:c500::/32	4.3B × /64	ARIN	PR	26th Jun 2026
2607:c540::/32	4.3B × /64	ARIN	US	11th Jul 2024
2607:c580::/32	4.3B × /64	ARIN	US	8th Nov 2016
2607:c5c0::/32	4.3B × /64	ARIN	US	17th Jul 2024